Invention Bump for liquid media
US4958752A · kind A · utility
24Cited by
17References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1988 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Aug 3, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1067
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The thrust piston pump of a delivery apparatus for liquid media and the like is provided with a valve arrangement in the suction passage. The valve arrangement has two valve seats acting in opposing manner and is associated with a single common valve body. This permits a rapid transfer of the valve body into the closed position engaging on the valve seat, particularly during operation in an inverted position. In addition, the discharge passage has a mechanically openably discharge valve which can be simply opened by displacing the actuating head of the pump with respect to a collar of the pump piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.